Don’t attempt to “judge” people too quickly (or at all). Their body language, eye movements, and even language might be affected by shyness, the circumstances, their stress levels, and their own difficulties with self-esteem. We too often create our own discomfort by interpreting others’ behavior as a negative commentary on ourselves.
Mindset: Don’t be influences by initial behaviors and don’t read too much into them. What you’re seeing is about them, not about you.